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  • Brutsaert, Wilfried  (5)
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  • 1
    Online Resource
    Online Resource
    Diurnal Variation of Surface Fluxes During Thorough Drying (or Severe Drought) of Natural Prairie
    American Geophysical Union (AGU) ; 1996
    In:  Water Resources Research Vol. 32, No. 7 ( 1996-07), p. 2013-2019
    Details
    In: Water Resources Research, American Geophysical Union (AGU), Vol. 32, No. 7 ( 1996-07), p. 2013-2019
    Abstract: Experimental data recorded over a natural tallgrass prairie during the later stages of drying in the First International Satellite Land Surface Climatology Project (ISLSCP) Field Experiment‐1987 showed (1) that the total daily values of evaporation exhibited a kind of second stage of drying behavior with a t −½ dependency at the daily timescale and (2) that this day‐to‐day evolution was modulated by the available energy at the surface, that is, the hourly radiation input. This allowed a simple description of the phenomenon by combining a desorptive diffusion‐type parameterization for the total daily evaporation or for its dimensionless counterpart (such as Priestley and Taylor's α, the evaporative fraction, and a few others), with an assumption of self‐preservation in the surface energy budget during the daytime hours. The resulting formulation, which involves two timescales, a daily and an hourly, was able to reproduce daytime hourly flux values over a 2‐week period of intensive drying. The method can also be useful in the disaggregation of daily, or even weekly, evaporation into hourly values.
    Type of Medium: Online Resource
    ISSN: 0043-1397 , 1944-7973
    URL: Article
    DOI: 10.1029/96WR00995
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 1996
    detail.hit.zdb_id: 2029553-4
    detail.hit.zdb_id: 5564-5
    SSG: 13
    SSG: 14
    Location Call Number Limitation Availability
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Satellite-Sensed Distribution and Spatial Patterns of Vegetation Parameters over a Tallgrass Prairie
    American Meteorological Society ; 1998
    In:  Journal of the Atmospheric Sciences Vol. 55, No. 7 ( 1998-04), p. 1225-1238
    Details
    In: Journal of the Atmospheric Sciences, American Meteorological Society, Vol. 55, No. 7 ( 1998-04), p. 1225-1238
    Type of Medium: Online Resource
    ISSN: 0022-4928 , 1520-0469
    URL: Article
    DOI: 10.1175/1520-0469(1998)055〈1225:SSDASP〉2.0.CO;2
    RVK:
    UA 4800
    Language: English
    Publisher: American Meteorological Society
    Publication Date: 1998
    detail.hit.zdb_id: 218351-1
    detail.hit.zdb_id: 2025890-2
    SSG: 16,13
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    Online Resource
  • 3
    Online Resource
    Online Resource
    Desorption and the two Stages of Drying of Natural Tallgrass Prairie
    American Geophysical Union (AGU) ; 1995
    In:  Water Resources Research Vol. 31, No. 5 ( 1995-05), p. 1305-1313
    Details
    In: Water Resources Research, American Geophysical Union (AGU), Vol. 31, No. 5 ( 1995-05), p. 1305-1313
    Abstract: During the First ISLSCP (International Satellite Land Surface Climatology Project) Field experiment (FIFE) the first stage of drying (with the atmosphere controlling) in these natural grasslands occurred when the soil was moist with a volumetric soil moisture content SM 〉 27% after rainfall. Both at the local scale and at the regional scale, once SM in the top 10 cm of the soil dropped below about 17% and its vertical gradient started to exceed about 1.1%/cm at 5 cm, the cumulative daily evaporation rate could be taken to be proportional to the square root of time, t ½ , which is not unlike a second stage of drying (with the soil moisture content controlling). Between these two drying stages, there was a transition period which lasted from several days to 2 weeks depending on the soil moisture conditions and on the season. The longer transition periods were observed under conditions of lower net radiation and of higher soil moisture content at depths in excess of, say, 50 cm. The present findings of gradual transitions from the first stage to a desorptive second stage of drying for a surface covered with grass (which can extract water from greater depths) are in contrast to earlier findings of relatively abrupt transitions for bare soil.
    Type of Medium: Online Resource
    ISSN: 0043-1397 , 1944-7973
    URL: Article
    DOI: 10.1029/95WR00323
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 1995
    detail.hit.zdb_id: 2029553-4
    detail.hit.zdb_id: 5564-5
    SSG: 13
    SSG: 14
    Location Call Number Limitation Availability
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    Online Resource
  • 4
    Online Resource
    Online Resource
    Diagnostics of land surface spatial variability and water vapor flux
    American Geophysical Union (AGU) ; 1995
    In:  Journal of Geophysical Research: Atmospheres Vol. 100, No. D12 ( 1995-12-20), p. 25595-25606
    Details
    In: Journal of Geophysical Research: Atmospheres, American Geophysical Union (AGU), Vol. 100, No. D12 ( 1995-12-20), p. 25595-25606
    Abstract: To assess the spatial variability of the water vapor (i.e., latent heat) flux LE , it is convenient to scale it with its equilibrium analog LE e . From an analysis of the data from the First International Satellite Land Surface Climatology Project (ISLSCP) Field Experiment, or FIFE, the spatial distribution of daily values of this dimensionless evaporation, α = LE / LE e , was found to be strongly related to the distributions of soil moisture and of the state of the vegetation. However, the relative strengths of these relationships depended on the soil moisture content and on its distribution. When the mean soil moisture content SM was high, in excess of about 27%, the distribution of evaporation was quite uniform regardless of the vegetation uniformity. In the intermediate range, with 20 〈 SM 〈 27%, both soil moisture and vegetation contributed to the spatial distribution of α. This distribution was controlled by the vegetation, when the soil moisture was uniform; under nonuniform soil moisture conditions, however, soil moisture exerted the major control. For SM 〈 20%, soil moisture normally was nonuniform, and it was found to hold the primary control of the spatial variation of α. The daily distribution of soil moisture content was largely independent from that of the state of the vegetation, due to the different timescales involved.
    Type of Medium: Online Resource
    ISSN: 0148-0227
    URL: Article
    DOI: 10.1029/95JD00973
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 1995
    detail.hit.zdb_id: 2033040-6
    detail.hit.zdb_id: 3094104-0
    detail.hit.zdb_id: 2130824-X
    detail.hit.zdb_id: 2016813-5
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    detail.hit.zdb_id: 2403298-0
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    detail.hit.zdb_id: 161667-5
    detail.hit.zdb_id: 2969341-X
    detail.hit.zdb_id: 161665-1
    detail.hit.zdb_id: 3094268-8
    detail.hit.zdb_id: 710256-2
    detail.hit.zdb_id: 2016804-4
    detail.hit.zdb_id: 3094181-7
    detail.hit.zdb_id: 3094219-6
    detail.hit.zdb_id: 3094167-2
    detail.hit.zdb_id: 2220777-6
    detail.hit.zdb_id: 3094197-0
    SSG: 16,13
    Location Call Number Limitation Availability
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    Online Resource
  • 5
    Online Resource
    Online Resource
    Spatial distribution and pattern persistence of surface soil moisture and temperature over prairie from remote sensing
    Elsevier BV ; 1997
    In:  Remote Sensing of Environment Vol. 61, No. 3 ( 1997-09), p. 347-360
    Details
    In: Remote Sensing of Environment, Elsevier BV, Vol. 61, No. 3 ( 1997-09), p. 347-360
    Type of Medium: Online Resource
    ISSN: 0034-4257
    URL: Article
    DOI: 10.1016/S0034-4257(97)84216-2
    Language: English
    Publisher: Elsevier BV
    Publication Date: 1997
    detail.hit.zdb_id: 1498713-2
    SSG: 11
    SSG: 14
    Location Call Number Limitation Availability
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    Online Resource
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